Resealing trap



May 19,v 1925.

H. J. LUFF RESEALING TRAP Filed June 9. 1922 1////l(// l///! Y lwonllf Henry I La,

i xL N s Patented Mey 19, 1925.

N UNITED STATES HENRY J'. LUFF, 0F CLEVELAND, OHIO,

PATENT ori-icen AssieNon, BY n EeNn .assIGNMnNTs fro MARY n. Lor-r, or CLEVELAND, omo. v,

RESEALNG TRAP.

yl-tpplication filed Tune 9,

l and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

Most municipal drainage regulations require certain minimum standards of sealing, scouring and resealing efficiency to be maintained in traps, under 4the maximum conditions of installation permissible and .it is with a view to fully meeting such requirements that thepresent resealing trap has been designed.

It is recognized by health officials that the water sealing trap placed under fixtures used to discharge liquid wastes into the building drainage system acts as a sentinel to guard against the inflow of noxious and germladen sewer air into homes and buildings, and therefore the requirement for the highest standard of efficiency is justied on the ground of public health. Experience has taught health ofhcials that the practice of relying wholly upon back-vent or re-vent pipes to maintain the water seal in uniform diameter traps is fraught with considerable danger and expense, since they frequently fail to function at the times of greatest need; their inefficiency being manifested by the fact that in protracted freezing temperatures the vapor from hot water discharged into the drainage system passes up through these back-vent or re-vent pipes and at the point where the latter extend through the roof this vapor freezes and the pipe is gradually reduced in Aarea and often completely frozen over. Moreover, in order to prevent birds from using these roof pipes as nests or peiching thereon, wire baskets are frequently placed over them, and these wire baskets reduce the area, so that it is practically impossible to prevent the non-functioning of these roof vents from frost closure or during ice storms.

Many forms of soi-called anti-Siphon traps have been designed to prevent complete 1922. Serial No. 567,181.

trapsiphonage, in whichbaifle .plates,'secret` partitions, deflectorastand pipes, and im-r practical enlargement of the outlet leg and depth of seal, have been used; but these have l retarded the natural outflow of thewaste, thus preventing self-scouring efficiency; also gathered hair and lint in such ainanner as to produce capillary attraction of the liquid and consequent siphonage of the trap seal; r

alsoy the solids retained created a foul odor in the trap sea-l; and in many suchtrapsl a defect in the casting has permitted lthe entire seal of the trap to leak unnoticed into the waste pipe, or sewer air to leak over the -seal of the trap into the room.

Tho provide a Aresealing trap which will obyiate all of the above noted 'defect-s `and ob'iecti-onsi has been the main purpose andl 4 object of the present invention, which latter,`

in one practical and approved embodiment thereof, is hereinafter fully described and disclosed in the accompanyingA drawings` in which# i Fig. l is avertical sectional elevation of an exposed trap embodying my invention, vwherein the inflow and discharge legs of the i trap are separate-castings joined 'by a union connection.

Fig. 2 is a vertical section taken on the line 2 2 of Fig. l; 'Y

Fig. 3 is a view similar to Fig. l of a trap wherein theuinletV andv discharge legs are made as a single cast-ing, the discharge. leo; being provided at its Vbot-tom with anin spection clean-out opening closed' by aureinovable plug; and

Fig. l is a horizontal section taken on the line 4--41 of Figs. l and 3; and

Fig. 5 is a plan view of the clean-out plug.

The resealingtrap of the present invention is broadly characterized by a provision Sli of a discharge leg` which is of greater diameter than the inlet leg and tlie'discharge opening of the trap, and substantially horizontal baflile plates at the upper end of the discharge leg so spaced as to effectively cause a resealing of the trap when the fixture. is discharged and at the same timey provide an opening between them of an area substantially equalto the area of the discharge opening; together with aclean-out and inspection opening at the lower end of the discharge leg of sufficient size to permit the insertion of the hand for inspection of `the ics ycondition of the bafiie plates and the ready removal of kany possible accumulations thereon.

Referring first toFigs. 1 and 2, 5 designates the inflow leg of the trap that may be connected at its uppery end by a union connection 6 to the drain pipe from a fixture;

' v forni the vbottoniofthe ,seal and at its upper and 7 designates the discharge legl of the trap of considerably/larger diameter than the inflow leg 5. The lower portion a of the inflow leg 5 is curved upwardly tof g .en'dis flared outwardly and widened to the iin-ion i oint 8.

'd tineter: the discharge leg 7, to the lower end of which it is connected by an ordinary 19` designatesv a tapped discharge opening of the ntrap locatedat the outer end of a narrowed upper portion 1G of thedischarge vpath ofv flow.

the lower edges ofthe extension 10v areleg 7, by which narrowed portion the waste is deflected from vertical to a "horizontal is clearly shown in Fig.. 2,

merged into the upper end of the main section7 ofthe discharge leg by a pair of' segmental shaped horizontal walls 11, seen also in Fig. el, lthe innerledg'es of which are eX- tended inwardly, as shown at 12 sufficiently to forni between them a substantially recta'ngulaif'port or opening 13, which `port or opening has substantially the same area as the discharge' pipe (not shown) which enters the tapped "discharge opening 9. y

The form of the invention illustrated in Fis. 3 embodiesall of the structural features above described in lconnection with Figs. 1 and 2 ,b-ut, in lieu ot` beingmade in two castings united by the union connection 8, it is made ina single casting; and for inspection and cleanout purpose's,the lower inclined wall ofl the discharge leg/" is formed with a sizabletapped opening 14 closed by ascrew plug 15; which latter, to

' facilitate its application and removal is provided with a plurality of spaced lugs 16 (F ig. 5),'foi' the application of a Spanner when siphonic Aaction takes place during a discharge, will quickly fall back .and refill the 4lower vcurved portion of the trap and secure the maximum depth of reseal.

In die device shown in Fig. 1inspection `and cleaning vare readily effected through the lower end of the discharge leg 7 by simply vdiseennecting the union connection S. This connection, moreover, obviously allows the setting of the inflow -leg 5 at anyk desired angle around the vertical Vaxis of' the discharge leg 7.

Vihile I show the elongated opening 13 as disposed parallel tothe discharge opening of the trap, it is manifest that the particular angle of saidiopening relatively to the dis-' charge opening isinmaterial; but to secure the best results, the two openings should be 7i of approximately the same area. 4 f i' Furthermore, while 'l show the discharge or outlet 9 at an angle of 90o to the discharge leg 7, or 7, of the trap, it is manifest that it will function with requal efficiency at any :ingle from to the vertical; or it may -bc offset so as to bring it in vertical alignnient with the inlet leg rof Athe trap. Again, while l show the inlet leg` kofthe trap-in a vertical position, it may with vequal efliciency bel disposed .at an angle of 45 to the vertical, crit may be carried at an angle of 900 from a point at least one inch above the,

bottom of the seal. The vterm tiesealiiigv'as used herein is understood in the artvby most persons skilled therein, but maybe briefly SiO explained, as follows. Vhen-siphonic action takes place, either by the length lof the vertical or ydownward gradeof the Xture .dis-

charged, or the passage :of .wastefroni a higher fixture` producing a vacuum, a, part of the trap seal is lsiphon'ed out until'. air

is admittedv through the inlet, after which` the water held in suspension whiley siphonic jaction is in progress, rell's and reseals theV trapy to a safe depth. To eiect the holding of sufficient water in suspension, the relative enlargement of the discharge leg ofthe trap and the ybaflies 11, 12,' are .contributing facyto-rs of'prime importance and eficiency.

I claiinfn .1. A resealing trap forv the discharge lines of plumbing fixtures having av -discharge leg loo of greater diameter than the discharge opening, and flat baffle plates -disposed transversely of said ydischaige legy in the same s horizontal plane and forming between them' an opening of substantially the area of' said discharge opening.

2. A resealing trap for the discharge lines of'pluinbing fixtures having a discharge leg of greater dia-meter than -thefdisc'harge open ing, and a pair of'flat segmental baffle plates disposed transversely of sa-id discharge leg vin the same horizontal plane and formingy between tlieinl a substantially rectangular openinghaving approximately the area of said discharge opening. v

3. A resealing trap for .the discharge lines of plumbing fixtures having a verticaly discharge leg and a horizontally directed discharge opening at the upper end of said discharge leg, the diameter of said discharge leg being greater than `the diameter of said discharge opening, and va pair of horizontal segmental baille plates disposed transversely of said discharge leg in the same horizontal plane and forming between them a substantially rectangular opening having approximately the area of said discharge opening.

4L. A resealing trap for the discharge lines of plumbing fixtures, having a vertical discharge leg and a horizontally directed discharge opening at the upper end of said discharge leg, the diameter of said discharge leg being greater than the diameter of the iniiow leg and of said discharge opening, and a pair of horizontal segmental baiile plates disposed transversely of said discharge leg at the level of the bottom of said discharge opening and forming between them a restricted flow passage of substan-` tially the same area as said discharge opening. y 4

5. A resealing trap for the discharge lines or" plumbing iixtur'es having a discharge leg of greater diameter than the discharge opening, baffle plates disposed transversely of the upper portion of said discharge leg in the same horizontal plane and formingv between them a restricted iow passage of substantially the same area as said discharge opening, a clean-out opening in the lower portion of said discharge leg7 anda removable plug closing said clean-out opening.

6. A resealing trap for the discharge lines of plumbing xtures, having a Vertical discharge leg and a horizontally directed disn charge passage at the upper end of said discharge leg, the diameter of said discharge leg being greater than the diameter of the inflow leg and of said discharge passage',

vand a pair oi'l horizontal segmental bafflek platesflocated on opposite sides respectively of said discharge passage at the level of the bottom of the latter and forming between them a relatively long and narrowl flow pasl sage whose longitudinal axis is' parallel with the axis of said discharge passage. y

HENRY J. LUFE, 

